Charlie Brown, security director for West Michigan’s Rockford school district, believes “every school had drugs in it.”

That’s why Rockford schools and numerous others in the area employ the services of Interquest Detection Canines of Michigan, Inc. – to search out illegal substances in school, such as drugs, weapons and other prohibited items, Mlive.com reports.

And the dogs are quite effective. Records obtained by the news site through public information requests shows Interquest has discovered more than 86 prohibited substances or items in area schools since 2011.